Circuit/System Testing

Ignition OFF, remove the Q14 EGR valve. Refer to Exhaust Gas Recirculation Valve Replacement . Inspect the Q14 EGR valve for the following conditions:

• A sticking, binding or frozen EGR valve
• Any coking, soot build up, debris or damage that can cause the EGR valve to stick partially open or closed
  • If a condition is found, clean or replace the Q14 EGR Valve as necessary.